* {
    margin: 0;
    padding: 0;
    color: #fff;
}

body {
    width: 100%;
    height: 100vh;
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: none;
}

div {
    position: absolute;
    font-size: 25px;
}

.rings {
    width: 50px;
    height: 50px;
    transform: rotate(0deg);
}

.rings span {
    width: 100%;
    height: 100%;
    position: absolute;
    animation: round 4s ease infinite calc(var(--d) * 0.2s);
}

@keyframes round {
    100% {
        transform: rotate(360deg);
    }
}

.rings span::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
}

.step {
    transform: translateY(100px);
    text-align: center;
}

.warning {
    bottom: 25px;
}